Elevator safety-contact.



=1. M. 00015. ELEVATOR SAFETY-CONTACT. APPLICATION HLEDiAPR. 'l 3. 191].

INI/ENTOR auaell 68 0i? A TTORNEY UNITED STATES PATENT OFFICE.

JOHN MAXWELL coor'n, or ELIZABETH, NEW JERSEY.-

- ELEVATOR SAFETY-confirms.

To all whom it may concern:

Be it known that I, JOHN MAXWELL Coo'rn, a citizen of the United States, and a resident of Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Elevator Safety-Contacts, of which the following is a specification.

The invention relates to safety appliances as used in connection with electrically operated elevators, lifts and the like where a door or gate is provided to prevent a passenger from leaving or entering the car; and it has for 'its object means which will prevent movement of the car while such entry or mat is possible, that is to say, the actuatmgcurrent for the latter will be cut ofli until the door or gate has been properly closed to bar entry or exit to or from the saidcar. p

'In the accompanying drawr'ngs, which illustrate the invention Figure 1 is a front elevation of the improved appliance; and Fig; 2 1s a vert1cal section therethrough taken on the line 22, Fiml.

Similar characters of reference designate corresponding parts throughout the several views.

Referring to the drawings, 10 designates a suitable casing adapted tobe secured to the wall or floor (not shown) surrounding the elevator shaft '(not' shown); may consist of two similar parts having upper and'lower lugs 11 for bolts, whereby the said parts may be securely locked together after the mechanism has been placed therein. The front of the casing is provided with a longitudinal slot or opening 12, preferably located centrally, and through which is adapted to project an anti-friction member such as a wheel or roller 13 controlling the safety mechanism. The case as a whole is designed to be conveniently set in the wall or floor (not shown) adjacent to the door or gate-indicated at 14 -So that the latter, in closing,,will engage the said roller. It is so located with respect to said door or gate that a portion of the roller, which normally projects through the slot beyond the casing wall, will be forced inwardly thereby to be substantially flush with the outer face of thecasing when the gate has been properly closed-all of which will be well understood by those skilled in the art.

Roller 13 is carried by a forked arm 15 secured to a slate base of the casing 10 or This casing T Specification of Letters Patent. Patented Sept, 3 1918, Application filed April 13, 1917 Serial No. 161,751. 7

directly to said casing so as to be movable about a pin 16 and is provided witha lateral extension or arm 17 substantially in the line of the inward move-- ment of said roller. This lateral arm carries at itsinner end a block of insulation to which is slidably secured a resilient strip or strips 18 of conducting material as phosphor bronze, and'having a longitudinal slot aforesaid, contact will be made between the free end'of said spring and surface of said block, the said end effecting a wiping contact, insuring thereby a clean surface and efficient electrical contact. As soon as the pressure is released upon said spring, its own I resiliency will tend'to free it from contact with the surface 20; and, furthermore, the center of gravityof the wheel and itsmovable mounting such that it has a tendency to swing outwardly and project a portion thereof through the slot 12 and beyond the casing wall. In case of breakafgeof the spring 18, moreover, there will be no danger of the circuit being closed and thesafety feature of the device becoming inoperative.

on said arm 15 limits the extent of A nose 17 the outward movement by engagement with the inner wall of casing 10. The lower end of spring 18 is connectedto a conductor 21,

and the contact member 19 to a conductor which are brought out of the casing through a suitableopening 23to controlling mechanism, such as a relay or similar device (not shown) for controlllng the operatlng current of the elevator or lift (not-shown).

It will be apparent that so long as the gate 14 is not closed, that is to say, has not passed beyond the projecting portion of the roller 13 to force the same inwardly and effect -cont-a ct between the end of spring member 18 and the surface 20, no current can be supplied to the elevator driving mechanism; and there is, therefore, no danger from premature starting of same. As soon as the 'door is properly closed, thus barring any 1. A safety appliance for electrically operated elevators and the like, comprising: a plvotally mounted anti-fraction member adapted normally to project into the path of movement of the door of the elevator; a flexible contact-making member secured at one end and connected with said anti-friction member; and a contact member which the free end of said flexible contact-making member is adapted to Wipe when the antifriction member is forced inwardly.

2. A safety appliance for electrically operated elevators and the like, comprising: a pivotally mounted anti-friction member adapted normally to project into the path of movement of the door of the elevator; a spring member secured at one end, curved at the free end and connected with said antifriction member; and an oppositely curved contact member adapted to be engaged by the free end of said spring member when the anti-friction member is forced inwardly.

3. A safety appliance for electrically operated elevators and the like, comprising: a pivoted arm and a roller carried thereby, the center of gravity of said arm and roller being such that said roller normally projects into the path of movement of the door of'the elevator, said arm being provided with a lateral extension; a conducting spring member carried by and insulated from said extension having one end secured to said casing and its other end free and rounded; and an oppositely curved contact member adapted to be engaged by the free end of said spring member when the roller is forced inwardly.

4c. A safety appliance for electrically opera-ted elevators and the like, comprising: a suitable casing provided with an opening; a pivoted arm, and a roller carried thereby, the center of gravity of said arm and roller being such that said roller normally projects through said opening beyond the casing, said arm being provided with a lateral extension; a conducting spring member carried by and insulated from said extension having one end pivoted at one side of said roller and its othe end free and rounded and extending beyond the other side of said roller; and an oppositely curved contact member adapted to be engaged by the free end of said spring member when the roller is forced inwardly.

5. A safety appliance for electrically operated elevators and the like, comprising: a suitable casing provided With an opening; a pivoted arm, and a roller carried thereby, the center of gravity of said arm and roller being such that said roller normally projects through said'opening beyond the casing, said arm being provided with a lateral extension; a nose on said arm adapted to contact with the casing to limit the outward movement of said roller; conducting spring member carried by and insulated from said extension having one end secured and its other end free and rounded; and an oppositely curved contact member adapted tovbe engaged by the free end of said spring member when the roller is forced inwardly.

6. A safety appliance for electrically operated elevators and the like, comprising: a suitable casing; an anti-friction member pivotally mounted therein and adapted nor mally to project into the path of movement of the door of the elevator; at contact-making membe attached at one end to said casing and slidably connected with the said anti-friction member; and a contact member adapted to be engaged by said contact-making member When the anti-friction member is forced inwardly.

7. A safety appliance for electrically operated elevators and the like, comprising: a suitable casing provided with-an opening; a pivoted arm, and a roller carried thereby, the center of gravity of said arm and roller being such that said roller normally projects through said opening beyond the easing, said armbeing provided With a lateral extension; a conducting spring member provided with a longitudinal slot for slidable connection to said extension and having one end secured at one side of said roller and its other end free and rounded and extending beyond the other side of said roller;

" J. MAXWELL COOTE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. i 

